CN112997755B - Active solar glass greenhouse based on intelligent temperature control of natural energy and operation mode - Google Patents
Active solar glass greenhouse based on intelligent temperature control of natural energy and operation modeInfo
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- CN112997755B CN112997755B CN202110193393.2A CN202110193393A CN112997755B CN 112997755 B CN112997755 B CN 112997755B CN 202110193393 A CN202110193393 A CN 202110193393A CN 112997755 B CN112997755 B CN 112997755B
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G9/00—Cultivation in receptacles, forcing-frames or greenhouses; Edging for beds, lawn or the like
- A01G9/14—Greenhouses
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G9/00—Cultivation in receptacles, forcing-frames or greenhouses; Edging for beds, lawn or the like
- A01G9/24—Devices or systems for heating, ventilating, regulating temperature, illuminating, or watering, in greenhouses, forcing-frames, or the like
- A01G9/243—Collecting solar energy
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G9/00—Cultivation in receptacles, forcing-frames or greenhouses; Edging for beds, lawn or the like
- A01G9/24—Devices or systems for heating, ventilating, regulating temperature, illuminating, or watering, in greenhouses, forcing-frames, or the like
- A01G9/245—Conduits for heating by means of liquids, e.g. used as frame members or for soil heating
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G9/00—Cultivation in receptacles, forcing-frames or greenhouses; Edging for beds, lawn or the like
- A01G9/24—Devices or systems for heating, ventilating, regulating temperature, illuminating, or watering, in greenhouses, forcing-frames, or the like
- A01G9/246—Air-conditioning systems
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/10—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
- Y02A40/25—Greenhouse technology, e.g. cooling systems therefor
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P60/00—Technologies relating to agriculture, livestock or agroalimentary industries
- Y02P60/12—Technologies relating to agriculture, livestock or agroalimentary industries using renewable energies, e.g. solar water pumping
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P60/00—Technologies relating to agriculture, livestock or agroalimentary industries
- Y02P60/14—Measures for saving energy, e.g. in green houses
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- Life Sciences & Earth Sciences (AREA)
- Environmental Sciences (AREA)
- Engineering & Computer Science (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Soil Sciences (AREA)
- Greenhouses (AREA)
Abstract
基于自然能源智能控温的主动式太阳玻璃温室及作业方式，属于农业温室及清洁供热技术领域。针对现状温室大棚因围护结构隔热效果差导致供热供冷负荷极大、高能耗、高能源费用的问题，采用基于自然能源智能控温的清洁供热系统方式，其中采用全新的嵌管式围护结构，嵌管内通入地水源低温热源水，冬季夜间承担外部环境散热，夏季白天吸纳太阳辐射放热，以显著降低冷热负荷；室内采用低温型分布式末端装置；由地水源热能、太阳能、空气能、热泵机组及蓄能罐组成的清洁热源系统，其中地水源热能直供嵌管式围护结构、热泵低温侧与降温湿帘，冬季较高温热能向室内末端供热，夏季由空气能及太阳能对地水源补热。本专利实现温室大棚的全年智能高效清洁供热供冷。
An active solar glass greenhouse and operating method based on natural energy intelligent temperature control belongs to the field of agricultural greenhouse and clean heating technology. To address the current greenhouse problem of extremely high heating and cooling loads, high energy consumption, and high energy costs due to poor insulation of the enclosure structure, a clean heating system based on natural energy intelligent temperature control is adopted. This system uses a brand-new embedded pipe enclosure structure, with low-temperature groundwater heat source water flowing into the embedded pipes. This water source dissipates heat from the external environment at night in winter and absorbs solar radiation during the day in summer to release heat, significantly reducing the heating and cooling loads. A low-temperature distributed terminal device is used indoors. The clean heat source system consists of groundwater heat energy, solar energy, air energy, a heat pump unit, and an energy storage tank. The groundwater heat energy is directly supplied to the embedded pipe enclosure structure, the low-temperature side of the heat pump, and the cooling wet curtain. In winter, higher-temperature heat energy is used to heat the indoor terminals, while in summer, air energy and solar energy supplement the groundwater source heat. This patent achieves year-round intelligent, efficient, and clean heating and cooling in greenhouses.
Description
Technical Field
The invention relates to an active solar glass greenhouse based on intelligent temperature control of natural energy and an operation mode, and belongs to the technical fields of agricultural greenhouses and clean heat supply.
Background
The greenhouse is an important infrastructure and high-efficiency production form in the field of agricultural production, especially the production of economic crops such as vegetables, fruits, flowers and medicines, wherein a large number of passive solar greenhouses are adopted in China, high-end glass greenhouses are being introduced in recent years, the annual production period of the glass greenhouses in Nordic Netherlands and other countries can reach 11 months, and the unit mu yield is extremely high. Taking tomato production as an example, the per-mu yield of the tomatoes needs to be seen as the planted variety and cultivation facilities. According to the growth, the method is generally divided into a self-capping type and an unlimited growth type, and the cultivation is divided into open-air cultivation and greenhouse cultivation. The general acreage of self-capping type open-air cultivation is 3000-4000 kg (which is reduced to 4.5-6.0 kg/m < 2 >), the general acreage of self-capping type greenhouse cultivation is 5000-7000 kg, the general acreage of unlimited growth type open-air cultivation is 4000-6000 kg, and the general acreage of unlimited growth type greenhouse cultivation is 10000-12000 kg (which is reduced to 15-18 kg/m < 2 >). The highest yield of the glass greenhouse in the Netherlands can reach 60 kg/m < 2 > (which is about 40000kg in terms of acre yield in the production area), and the yield is 10.0-13.3 times of that of the conventional open-air cultivation acre yield, and is 3.3-4.0 times of that of the conventional infinitely-growing greenhouse cultivation acre yield. Therefore, reasonable production facilities and technical processes are adopted, so that the agricultural production efficiency can be greatly improved, and an intensive agricultural production mode is realized.
Different crops and the growing process thereof have different technical conditions and requirements on the environment, for example, the air parameter requirements of the large tomatoes which are eaten in common are that the temperature of a crop growing layer is 0.6-3.3 m away from the ground, the temperature of the crop growing layer in summer is lower than 35 ℃ in daytime and lower than 25 ℃ in nighttime, the temperature of the crop growing layer in winter is not lower than 25 ℃ in daytime and not lower than 15 ℃ in nighttime, and the humidity requirement is 45% -50% (more than 55% of diseases are easy to occur). The parameter control requirement of the glass greenhouse for planting flowers is that the indoor design temperature of an orchid seedling raising area is required to be 28-31 ℃ throughout the year, but not lower than 28 ℃, otherwise, the growth, plant form and even failure of orchid seedlings are seriously affected, and the design temperature of an orchid flowering area and a flower forcing area is less than 25 ℃ in the daytime in summer and 18 ℃ in 14 hours at night. In a word, the control precision of parameters required by orchid growth is very high, and the control precision is guaranteed all year round.
Taking a glass greenhouse with higher production efficiency as an example, the production efficiency is very high, but the proportion adopted in domestic greenhouse production is very low (about 1 percent level), and various prominent problems exist at present.
The energy consumption is overlarge, for example, the indoor temperature and humidity parameter control is carried out according to the higher growth efficiency of crops, the energy cost of the device accounts for about 60% of the total operation cost, and the initial investment of the glass greenhouse is higher, so that the investment recovery period is overlong, and the economic benefit is not obvious.
The production operation time after the technology is introduced in China is only about half a year, the yield is reduced by about half when the production operation time is less than 11 months in the Netherlands, and the product income is greatly reduced.
In order to control energy cost, the temperature of the winter severe cold stage is low, the temperature of the summer is too high, crops cannot grow normally, for example, the measured temperature in summer can reach 50-60 ℃, which is one of the main reasons for the domestic glass greenhouse production time to be far less than 11 months, the environmental temperature of northern European countries such as the netherlands is relatively low, and the situation of summer overheat is rarely caused.
With the increasing emphasis on environmental protection, the relatively inexpensive heat supply modes such as coal-fired boilers face the situation of reduction or even banned, and the alternative gas-fired boilers and other energy sources have higher cost and poorer economic benefit.
On the other hand, energy saving technology and clean heat supply mode have been rapidly developed in recent years, wherein the professor team of the university of Qinghai building environment and equipment institute Li Xianting initiates and the clean heat supply technology related to the development and industrialization of the combined engineering technology by the institute of energy technology of Beijing Qingdao.
The embedded pipe type enclosure structure based on natural energy and the energy-saving building technology can realize that geothermal energy, solar energy, air energy (in the form of a cooling tower and the like) are utilized to be introduced into an embedded heat exchange element, and the heat obtaining amount or the heat dissipating amount of ambient air, solar radiation and the like is taken away by a heat carrying medium of the natural energy, so that the active temperature control is carried out on the building, and the heat supply load in winter and the cooling load demand in summer are greatly reduced.
The flexible multi-source complementary heat pump clean heat supply technology can send a low-temperature heat source system combining geothermal energy, solar energy, air energy, industrial waste heat and other crops into a group of water-water type heat pump units for heating or refrigerating, so that a very high energy efficiency ratio (which is 50% -100% higher than that of an air source heat pump such as a multi-split air conditioner on average) can be achieved, and energy cost is greatly reduced while efficient heating and refrigerating are realized.
The indoor heat supply and cooling terminal adopts a flexible distributed terminal mode, can perform personalized control on temperature and humidity parameters of large-space air, effectively reduce overall energy and operation cost while realizing local control parameters, can maximally reduce water supply temperature and improve heat source heating efficiency during heat supply operation, and can improve cold source water supply temperature and even directly use groundwater for cooling during cooling operation without opening or seldom opening artificial refrigeration.
Disclosure of Invention
The invention aims at solving the main problems of the agricultural greenhouse, particularly the high-efficiency glass greenhouse, adopts the latest technical development results of clean heat supply, combines the actual technical conditions of the agricultural greenhouse with the production operation requirements, designs a brand-new integrated technical system and an energy system operation mode of the active solar glass greenhouse based on intelligent temperature control of natural energy, fundamentally changes the problem of overhigh energy consumption, and provides basic technical conditions for greatly reducing the energy operation cost, improving the effective time of production operation and improving the crop yield and economic benefit.
The invention specifically describes an active solar glass greenhouse based on intelligent temperature control of natural energy, which is characterized in that the whole system consists of an enclosure structure 1 of an embedded pipe type active temperature control device, a passive heat preservation and insulation device, an indoor low-temperature type distributed end device, a low-temperature type heat source system based on natural energy, a water pump and a connecting pipeline, wherein the enclosure structure 1 comprises a male wall body 2, a female wall body 3 and a greenhouse ceiling 5, wherein the male wall body 2 is matched with a side sunshade curtain 21 and a male embedded pipe 22, the female wall body 3 is matched with a female embedded pipe 23, the greenhouse ceiling 5 is matched with an upper sunshade curtain 26 and an upper embedded pipe 25, and the passive heat preservation and insulation device comprises a heat preservation curtain 4, The indoor low-temperature distributed end device comprises a ground heating pipe 6, a middle heating pipe 6a and a wet curtain 8, and also comprises a low-temperature end device 24, a low-temperature heat source system based on natural energy comprises a ground water source well 31, a solar heat collector 32, a heat pump unit 33 and an energy storage tank 34, wherein the water outlet of the ground water source well 31 is connected with a low Wen Cejin water outlet of the heat pump unit 33, the water inlet of the solar heat collector 32 and the second water inlet of the energy storage tank 34 through a ground water pump 37, and is also connected with a male surface embedded pipe 22, a female surface embedded pipe 23, an upper embedded pipe 25 and the water inlet of the wet curtain 8, the water inlet of the ground water source well 31 is connected with the water outlet of the low-temperature side of the heat pump unit 33 and the water outlet of the energy storage tank 34 through the energy storage pump 35, and is also connected with the male surface embedded pipe 22, The water outlet of the solar heat collector 32 is also connected with the water inlet of an energy storage tank 34, the water outlet of the energy storage tank 34 is connected with the water outlet of the high temperature side of a heat pump unit 33 through an energy storage pump 35 and a heat pump circulating pump 36, and is also respectively connected with the water inlets of a ground heating pipe 6, a middle heating pipe 6a and a low temperature type end device 24, the water outlets of the ground heating pipe 6, the middle heating pipe 6a and the low temperature type end device 24 are respectively connected with the water inlet of the solar heat collector 32 and the water inlet of the heat pump unit 33 and the water outlet of the high Wen Cejin, the solar wall 2 is of a sandwich convector structure which comprises an outer transparent layer 2a, The inner transparent layer 2c and the side sunshade curtain 2b are arranged outside the side sunshade curtain 2b, a side sunshade curtain 21 is arranged on the inner side of the side sunshade curtain 2b, a sun surface embedded pipe 22 is arranged on the inner side of the side sunshade curtain 21, a convection air inlet window 28a is arranged at the bottom of the outer transparent layer 2a, and a convection air outlet window 28 is arranged at the top of the outer transparent layer 2a, the inner wall 3 adopts a solid structure and embeds the matched inner surface embedded pipe 23 into the solid structure, or adopts a sandwich structure, wherein the inner solid layer 3a embeds the inner surface embedded pipe 23, an upper sunshade curtain 26 matched with the greenhouse roof 5 is arranged on the lower side of the greenhouse roof 5, an upper embedded pipe 25 is arranged on the lower side of the upper sunshade curtain 26, and the outer transparent layer 2a, The inner transparent layer 2c and the greenhouse ceiling 5 are made of high-transmittance glass or high-transmittance plastic films, the heat insulation curtain 4, the middle part Wen Mubu a, the side sunshade curtains 21 and the upper sunshade curtain 26 are made of high-reflectivity surfaces on two sides, the thickness of the outer heat insulation curtain 27 is 1-10 mm, the low-temperature end device 24 is arranged in the lower space of the plant seedbed 7 in the production area, the heat exchange element 24a is a plastic pipe, a steel fin or copper pipe aluminum fin pipe structure, the bottom is provided with a condensate water tray 24b which falls to the ground, or buried under the ground, the heat exchange element 24a is a plastic pipe, or vertically arranged at the upper part of the plant seedbed 7 in the production area, And is positioned in the middle of the stem and leaf of the plant and used as a fence for supporting the plant growth, at the moment, the heat exchange element 24a is a plastic pipe, the water temperature in the pipe does not exceed the allowable temperature range of the plant growth, or is arranged along the inner wall of the outer wall, at the moment, the heat exchange element 24a is a plastic pipe, a steel finned pipe or a copper pipe aluminum finned pipe structure.
The operation modes of the active solar glass greenhouse based on the intelligent natural energy temperature control and the operation modes of the solar embedded pipe 22, the cathode embedded pipe 23 and the upper embedded pipe 25 are characterized in that the operation modes of the active solar glass greenhouse take technical requirements of illumination, temperature, humidity and wind speed and energy-saving operation cost as control targets according to environmental parameters of a crop growing area, the system components and an executing mechanism thereof are taken as operation adjusting means, and intelligent heat and cold supply load adjustment, natural energy operation control and heat source equipment selection and transmission and distribution management are carried out according to the control modes of 'people in a loop' and the environmental parameter control requirements of different stages of crop growth according to the following time and technical conditions.
First, during night heating operation in winter, the heat insulation curtain 4, the middle-layer Wen Mubu a, the upper sunshade curtain 4b, the outer heat insulation curtain 27, the side sunshade curtain 21, the upper sunshade curtain 26, the convection air inlet window 28a and the convection air outlet window 28 are all closed and enter a passive heat insulation state, the water outlet of the ground water source well 31 is sent into the sunny side embedded pipe 22, the cloudy side embedded pipe 23 and the upper embedded pipe 25 by the ground water pump 37 and enters an active heat insulation state, the water outlet of the energy storage tank 34 is sent into the ground heating pipe 6, the middle-layer heating pipe 6a and the low-temperature type end device 24 by the energy storage pump 35 and is heated, the backwater returns to the energy storage tank 34, when the room temperature is lower than a low limit set value, the water outlet of the ground water source well 31 is simultaneously sent into the heat pump unit 33 by the ground water pump 37, and the heat pump unit 33 is combined with the energy storage tank 34 by the heat pump circulating pump 36, the heat supply is simultaneously returned to the heat pump unit 33 and the backwater tank 34, when the room temperature is higher than the high limit set value, if the room temperature is still maintained higher than the high limit set value, the air supply tank is reduced when the room temperature is still maintained higher than the high limit set value, or the air supply tank 34 is stopped when the room temperature is lower than the low limit set temperature is started, and the heat storage tank 34 is preferably started.
Secondly, when the heat preservation curtain 4, the middle-protection Wen Mubu a, the upper sunshade curtain 4b and the outer heat preservation curtain 27 are rolled up during daytime running in winter, the side sunshade curtains 21 and the upper sunshade curtain 26 are opened and are in a maximum sunlight transmission state, the convection air inlet window 28a and the convection air outlet window 28 are closed and enter a passive heat preservation state, if the room temperature is lower than a low limit set value, the water outlet of the ground water source well 31 is sent into the sun surface embedded pipe 22, the cathode surface embedded pipe 23 and the upper embedded pipe 25 by the ground water pump 37 and enters an active heat preservation state, the water outlet of the energy storage tank 34 is sent into the ground heating pipe 6, the middle-layer heating pipe 6a and the low-temperature end device 24 by the energy storage pump 35 and is heated, the backwater returns to the energy storage tank 34, and when the room temperature is lower than the low limit set value, the water outlet of the ground water source well 31 is simultaneously sent into the heat pump 33 by the ground water pump 37, and the heat pump unit 33 is started and combined with the energy storage tank 34 by the heat pump unit 36, the heat supply backwater returns to the heat pump unit 33 and the energy storage tank 34 at the same time, when the room temperature is higher than the high limit set value, the heat pump unit 33 is stopped, if the room temperature is still higher than the high limit set value after the heat pump unit 33 is stopped, the heat supply of the energy storage tank 34 is reduced or stopped, if the room temperature is still higher than the high limit set value after the heat supply of the energy storage tank 34 is stopped, the operation of the ground water source heat source water of the male surface embedded pipe 22 and the upper embedded pipe 25 is stopped and the active heat preservation state is stopped, when the room temperature is still higher than the high limit set value, the male surface embedded pipe 22 and the upper embedded pipe 25 are converted into the active heat preservation operation, at the moment, the energy storage pump 35 pumps the energy storage circulating water into the male surface embedded pipe 22 and the upper embedded pipe 25, the backwater enters the energy storage tank 34 and enters the energy storage state until the room temperature is lower than the low limit set value, the heating process is gradually performed in the reverse order of the temperature reduction process, until the room temperature is higher than the lower limit set value.
Thirdly, when the daytime room temperature in the non-heating period is higher than the high limit set value, the heat preservation curtain 4, the middle heat preservation Wen Mubu a and the outer heat preservation curtain 27 are rolled up, the side sunshade curtains 21, the upper sunshade curtain 26 and the upper sunshade curtain 4b are all opened and are in an illumination state required by plant growth, the convection air inlet window 28a and the convection air outlet window 28 are all opened and enter an active cooling state, if the room temperature is higher than the high limit set value, the water outlet of the ground water source well 31 is sent into the male surface embedded pipe 22, the female surface embedded pipe 23 and the upper embedded pipe 25 by the ground water pump 37 and enters the active cooling state, when the room temperature is higher than the high limit set value, the water outlet of the ground water source well 31 is simultaneously sent into the energy storage tank 34 by the ground water pump 37 and is sent into the low-temperature end device 24 or the ground heating pipe 6 or the middle-layer heating pipe 6a by the energy storage pump 35 and is cooled, when the room temperature is higher than the high limit setting value, the water outlet of the ground water source well 31 is simultaneously sent into the wet curtain 8 by the ground source water pump 37 and is in a direct contact type active cooling state, when the room temperature is higher than the high limit setting value, the water outlet of the ground water source well 31 is simultaneously sent into the heat pump unit 33 by the ground source water pump 37, the heat pump unit 33 is started and is sent into the low-temperature end device 24 or the ground heating pipe 6 or the middle-layer heating pipe 6a by the heat pump circulating pump 36 and is subjected to combined cooling, and when the room temperature is lower than the low limit setting value, the gradual heating process is carried out according to the reverse order of the cooling process until the room temperature is higher than the low limit setting value.
Fourth, when the night room temperature in the non-heating period is higher than the high limit set value, on the basis of the third step, the indoor and outdoor ventilation cooling devices are combined and opened.
The ground water source well 31 adopts a shallow or deep underground water well structure, at least one recharging well is matched with each pumping well at the moment, or a buried pipe well structure is adopted, at the moment, a single U pipe or double U pipe structure is adopted in the well, and the pipe is a PE pipe.
The heat pump unit 33 is a water-water heat pump structure, and a four-way reversing valve inside the heat pump unit or a water valve switching structure outside the heat pump unit is adopted for heat supply and cold supply mode conversion.
Aiming at the problems of extremely high heat and cold supply load and overhigh energy cost caused by high energy consumption due to poor heat insulation effect of an enclosure structure of the greenhouse in the current situation, the invention adopts a clean heat supply system mode based on intelligent temperature control of natural energy, and has the advantages that a brand new embedded pipe type enclosure structure is adopted, ground water source low-temperature heat source water is introduced into an embedded pipe, external environment heat dissipation is born at night in winter, solar radiation heat release is absorbed in daytime in summer, and the cold and hot load is remarkably reduced; the indoor clean heat source system consists of geothermal source heat energy, solar energy, air energy, heat pump set and energy accumulating tank, and is one flexible heat source mode with supplementary functions, and may be used flexibly to supply cold and heat via natural energy source, reduce artificial energy and cost, reduce artificial energy consumption and energy running cost by 40-80%, store partial solar energy in the energy accumulating tank and lower temperature during the daytime, improve crop growth condition, and prolong effective production period. In summary, the patent provides the best production conditions for the production operation of the agricultural greenhouse including the glass greenhouse, obviously improves the crop productivity, obviously reduces the energy cost, and creates better technical conditions for the large-scale production of the greenhouse, in particular the glass greenhouse.
Drawings
Fig. 1 is a schematic diagram of a conventional glass greenhouse and a heating system thereof according to the present invention, and fig. 2 is a schematic diagram of a system according to the present invention.
The component numbers and names in fig. 1 and 2 are as follows.
The building envelope 1, the sunny side wall 2, the outer transparent layer 2a, the side sunshade curtain 2b, the inner transparent layer 2c, the cloudy side wall 3, the inner solid layer 3a, the heat insulation curtain 4, the middle part Wen Mubu a, the upper sunshade curtain 4b, the greenhouse ceiling 5, the ground heating pipe 6, the middle heating pipe 6a, the high-rise heating pipe 6b, the plant seedbed 7, the wet curtain 8, the side sunshade curtain 21, the sunny side embedding pipe 22, the cloudy side embedding pipe 23, the low-temperature end device 24, the heat exchange element 24a, the condensed water receiving tray 24b, the upper embedding pipe 25, the upper sunshade curtain 26, the outer heat insulation curtain 27, the convection air outlet window 28, the convection air inlet window 28a, the ground water source well 31, the solar collector 32, the heat pump unit 33, the energy storage tank 34, the energy storage pump 35, the heat pump circulation pump 36 and the ground source water pump 37.
Detailed Description
Fig. 1 is a schematic diagram of a conventional glass greenhouse and a heating system thereof according to the present invention, and fig. 2 is a schematic diagram of a system according to the present invention.
The prior art method and structure of the glass greenhouse and the heat supply method thereof related in fig. 1 are that a greenhouse wall adopts double-layer glass (or plastic), a middle interlayer is provided with a layer of sunshade curtain, a greenhouse ceiling adopts single-layer glass (or plastic), the upper part of an operation area is provided with a plurality of layers of sunshade curtains or heat insulation curtains, the outer side (or inner side) of a building envelope is provided with a thicker heat insulation curtain (similar to a cotton quilt), indoor heat supply is usually carried out by adopting a high Wen Moduan and is integrated with a landing track, a transverse support of crops and the like, a heat source of the indoor heat supply is usually required to be 60-90 ℃ high Wen Gongshui, and wet curtain cooling is adopted in summer.
Fig. 2 is a schematic diagram of the system of the present invention, and an embodiment of the present invention is as follows.
The whole system consists of an enclosure structure 1 of an embedded pipe type active temperature control device, a passive heat preservation and insulation device, an indoor low-temperature type distributed end device, a low-temperature type heat source system based on natural energy, a water pump and a connecting pipeline, wherein the enclosure structure 1 comprises a sunny wall 2, a cloudy wall 3 and a greenhouse ceiling 5, the sunny wall 2 is matched with a side sunshade curtain 21 and a sunny embedded pipe 22, the cloudy wall 3 is provided with a cloudy embedded pipe 23, the greenhouse ceiling 5 is matched with an upper sunshade curtain 26 and an upper embedded pipe 25, and the passive heat preservation and insulation device comprises a heat preservation curtain 4, a middle part Wen Mubu a, an upper sunshade curtain 4b, The outdoor heat-preserving curtain 27, the indoor low-temperature type distributed end device comprises a ground heating pipe 6, a middle heating pipe 6a and a wet curtain 8, and also comprises a low-temperature type end device 24, a low-temperature type heat source system based on natural energy comprises a ground water source well 31, a solar heat collector 32, a heat pump unit 33 and an energy storage tank 34, wherein the water outlet of the ground water source well 31 is connected with a low Wen Cejin water outlet of the heat pump unit 33, the water inlet of the solar heat collector 32 and the second water inlet of the energy storage tank 34 through a ground water pump 37, and is also connected with a male surface embedded pipe 22, a female surface embedded pipe 23, an upper embedded pipe 25 and the water inlet of the wet curtain 8, and the water inlet of the ground water source well 31 is connected with the water outlet of the low-temperature side of the heat pump unit 33 and the water outlet of the energy storage tank 34 through the energy storage pump 35, and is also connected with the male surface embedded pipe 22, The water outlet of the solar heat collector 32 is also connected with the water inlet of an energy storage tank 34, the water outlet of the energy storage tank 34 is connected with the water outlet of the high temperature side of a heat pump unit 33 through an energy storage pump 35 and a heat pump circulating pump 36, and is also respectively connected with the water inlets of a ground heating pipe 6, a middle heating pipe 6a and a low temperature type end device 24, the water outlets of the ground heating pipe 6, the middle heating pipe 6a and the low temperature type end device 24 are respectively connected with the water inlet of the solar heat collector 32 and the water inlet of the heat pump unit 33 and the water outlet of the high Wen Cejin, the solar wall 2 is of a sandwich convector structure which comprises an outer transparent layer 2a, The inner transparent layer 2c and the side sunshade curtain 2b are arranged outside the side sunshade curtain 2b, a side sunshade curtain 21 is arranged on the inner side of the side sunshade curtain 2b, a sun surface embedded pipe 22 is arranged on the inner side of the side sunshade curtain 21, a convection air inlet window 28a is arranged at the bottom of the outer transparent layer 2a, and a convection air outlet window 28 is arranged at the top of the outer transparent layer 2a, the inner wall 3 adopts a solid structure and embeds the matched inner surface embedded pipe 23 into the solid structure, or adopts a sandwich structure, wherein the inner solid layer 3a embeds the inner surface embedded pipe 23, an upper sunshade curtain 26 matched with the greenhouse roof 5 is arranged on the lower side of the greenhouse roof 5, an upper embedded pipe 25 is arranged on the lower side of the upper sunshade curtain 26, and the outer transparent layer 2a, The inner transparent layer 2c and the greenhouse ceiling 5 are made of high-transmittance glass or high-transmittance plastic films, the heat insulation curtain 4, the middle part Wen Mubu a, the side sunshade curtains 21 and the upper sunshade curtain 26 are made of high-reflectivity surfaces on two sides, the thickness of the outer heat insulation curtain 27 is 1-10 mm, the low-temperature end device 24 is arranged in the lower space of the plant seedbed 7 in the production area, the heat exchange element 24a is a plastic pipe, a steel fin or copper pipe aluminum fin pipe structure, the bottom is provided with a condensate water tray 24b which falls to the ground, or buried under the ground, the heat exchange element 24a is a plastic pipe, or vertically arranged at the upper part of the plant seedbed 7 in the production area, And is positioned in the middle of the stem and leaf of the plant and used as a fence for supporting the plant growth, at the moment, the heat exchange element 24a is a plastic pipe, the water temperature in the pipe does not exceed the allowable temperature range of the plant growth, or is arranged along the inner wall of the outer wall, at the moment, the heat exchange element 24a is a plastic pipe, a steel finned pipe or a copper pipe aluminum finned pipe structure.
The operation modes of the active solar glass greenhouse based on intelligent natural energy temperature control and the operation modes of the solar embedded pipe 22, the cathode embedded pipe 23 and the upper embedded pipe 25 are as follows, wherein the technical requirements of illumination, temperature, humidity and wind speed and energy-saving operation cost are used as control targets according to the environmental parameters of a crop growing area, the system components and the executing mechanisms thereof are used as operation adjusting means, and the intelligent heat and cold supply load adjustment, the natural energy operation control and the heat source equipment selection and distribution management are carried out according to the control mode of 'people in a loop' and the environmental parameter control requirements of different stages of crop growth are met according to the following time and technical conditions.
First, during night heating operation in winter, the heat insulation curtain 4, the middle-layer Wen Mubu a, the upper sunshade curtain 4b, the outer heat insulation curtain 27, the side sunshade curtain 21, the upper sunshade curtain 26, the convection air inlet window 28a and the convection air outlet window 28 are all closed and enter a passive heat insulation state, the water outlet of the ground water source well 31 is sent into the sunny side embedded pipe 22, the cloudy side embedded pipe 23 and the upper embedded pipe 25 by the ground water pump 37 and enters an active heat insulation state, the water outlet of the energy storage tank 34 is sent into the ground heating pipe 6, the middle-layer heating pipe 6a and the low-temperature type end device 24 by the energy storage pump 35 and is heated, the backwater returns to the energy storage tank 34, when the room temperature is lower than a low limit set value, the water outlet of the ground water source well 31 is simultaneously sent into the heat pump unit 33 by the ground water pump 37, and the heat pump unit 33 is combined with the energy storage tank 34 by the heat pump circulating pump 36, the heat supply is simultaneously returned to the heat pump unit 33 and the backwater tank 34, when the room temperature is higher than the high limit set value, if the room temperature is still maintained higher than the high limit set value, the air supply tank is reduced when the room temperature is still maintained higher than the high limit set value, or the air supply tank 34 is stopped when the room temperature is lower than the low limit set temperature is started, and the heat storage tank 34 is preferably started.
Secondly, when the heat preservation curtain 4, the middle-protection Wen Mubu a, the upper sunshade curtain 4b and the outer heat preservation curtain 27 are rolled up during daytime running in winter, the side sunshade curtains 21 and the upper sunshade curtain 26 are opened and are in a maximum sunlight transmission state, the convection air inlet window 28a and the convection air outlet window 28 are closed and enter a passive heat preservation state, if the room temperature is lower than a low limit set value, the water outlet of the ground water source well 31 is sent into the sun surface embedded pipe 22, the cathode surface embedded pipe 23 and the upper embedded pipe 25 by the ground water pump 37 and enters an active heat preservation state, the water outlet of the energy storage tank 34 is sent into the ground heating pipe 6, the middle-layer heating pipe 6a and the low-temperature end device 24 by the energy storage pump 35 and is heated, the backwater returns to the energy storage tank 34, and when the room temperature is lower than the low limit set value, the water outlet of the ground water source well 31 is simultaneously sent into the heat pump 33 by the ground water pump 37, and the heat pump unit 33 is started and combined with the energy storage tank 34 by the heat pump unit 36, the heat supply backwater returns to the heat pump unit 33 and the energy storage tank 34 at the same time, when the room temperature is higher than the high limit set value, the heat pump unit 33 is stopped, if the room temperature is still higher than the high limit set value after the heat pump unit 33 is stopped, the heat supply of the energy storage tank 34 is reduced or stopped, if the room temperature is still higher than the high limit set value after the heat supply of the energy storage tank 34 is stopped, the operation of the ground water source heat source water of the male surface embedded pipe 22 and the upper embedded pipe 25 is stopped and the active heat preservation state is stopped, when the room temperature is still higher than the high limit set value, the male surface embedded pipe 22 and the upper embedded pipe 25 are converted into the active heat preservation operation, at the moment, the energy storage pump 35 pumps the energy storage circulating water into the male surface embedded pipe 22 and the upper embedded pipe 25, the backwater enters the energy storage tank 34 and enters the energy storage state until the room temperature is lower than the low limit set value, the heating process is gradually performed in the reverse order of the temperature reduction process, until the room temperature is higher than the lower limit set value.
Thirdly, when the daytime room temperature in the non-heating period is higher than the high limit set value, the heat preservation curtain 4, the middle heat preservation Wen Mubu a and the outer heat preservation curtain 27 are rolled up, the side sunshade curtains 21, the upper sunshade curtain 26 and the upper sunshade curtain 4b are all opened and are in an illumination state required by plant growth, the convection air inlet window 28a and the convection air outlet window 28 are all opened and enter an active cooling state, if the room temperature is higher than the high limit set value, the water outlet of the ground water source well 31 is sent into the male surface embedded pipe 22, the female surface embedded pipe 23 and the upper embedded pipe 25 by the ground water pump 37 and enters the active cooling state, when the room temperature is higher than the high limit set value, the water outlet of the ground water source well 31 is simultaneously sent into the energy storage tank 34 by the ground water pump 37 and is sent into the low-temperature end device 24 or the ground heating pipe 6 or the middle-layer heating pipe 6a by the energy storage pump 35 and is cooled, when the room temperature is higher than the high limit setting value, the water outlet of the ground water source well 31 is simultaneously sent into the wet curtain 8 by the ground source water pump 37 and is in a direct contact type active cooling state, when the room temperature is higher than the high limit setting value, the water outlet of the ground water source well 31 is simultaneously sent into the heat pump unit 33 by the ground source water pump 37, the heat pump unit 33 is started and is sent into the low-temperature end device 24 or the ground heating pipe 6 or the middle-layer heating pipe 6a by the heat pump circulating pump 36 and is subjected to combined cooling, and when the room temperature is lower than the low limit setting value, the gradual heating process is carried out according to the reverse order of the cooling process until the room temperature is higher than the low limit setting value.
Fourth, when the night room temperature in the non-heating period is higher than the high limit set value, on the basis of the third step, the indoor and outdoor ventilation cooling devices are combined and opened.
The ground water source well 31 adopts a shallow or deep underground water well structure, at least one recharging well is matched with each pumping well at the moment, or a buried pipe well structure is adopted, at the moment, a single U pipe or double U pipe structure is adopted in the well, and the pipe is a PE pipe.
The heat pump unit 33 is a water-water heat pump structure, and a four-way reversing valve inside the heat pump unit or a water valve switching structure outside the heat pump unit is adopted for heat supply and cold supply mode conversion.
It should be noted that the present invention provides an active solar glass greenhouse and an operation mode based on intelligent temperature control of natural energy, and provides a specific implementation method, a flow and an implementation device for achieving the above purpose, and according to this general solution, there may be different specific implementation measures and specific implementation devices with different structures, where the specific implementation is only one of these specific implementations, and any other similar simple modification implementations, such as an active cooling maintenance structure with different heat exchange forms and measures, adding or reducing several temperature control measures, adopting a cooling tower to replace a water source well to cool in summer, or simply adjusting a water system pipeline connection method, or performing a modification mode that can be supposed by a common professional, etc., or applying the technical mode to a tall space such as a traditional agricultural greenhouse, an industrial factory building, etc. and other similar application occasions with the same or similar structures, all fall within the protection scope of the present invention.
Claims (4)
1. The active solar glass greenhouse based on intelligent temperature control of natural energy is characterized in that the whole system consists of an enclosure structure (1) of an embedded pipe type active temperature control device, a passive heat preservation and insulation device, an indoor low-temperature type distributed end device, a low-temperature type heat source system based on natural energy, a water pump and a connecting pipeline, wherein the enclosure structure (1) comprises a sun-surface wall body (2), a shade surface wall body (3) and a greenhouse roof (5), the sun-surface wall body (2) is matched with a side sunshade curtain (21) and a sun-surface embedded pipe (22), the shade surface wall body (3) is provided with the shade surface embedded pipe (23), the greenhouse roof (5) is matched with an upper sunshade curtain (26) and an upper embedded pipe (25), and the passive heat preservation and insulation device comprises a heat preservation curtain (4), The indoor low-temperature type distributed end device comprises a ground heating pipe (6), a middle heating pipe (6 a) and a wet curtain (8), and further comprises a low-temperature type end device (24), a low-temperature type heat source system based on natural energy comprises a ground water source well (31), a solar heat collector (32), a heat pump unit (33) and an energy storage tank (34), wherein a water outlet of the ground water source well (31) is connected with a low Wen Cejin water outlet of the heat pump unit (33), a water inlet of the solar heat collector (32) and a second water inlet of the energy storage tank (34) through a ground water pump (37), and is further connected with a solar surface embedded pipe (22), The water inlet of the ground water source well (31) is connected with the low-temperature side water outlet of the heat pump unit (33) and the water outlet of the energy storage tank (34) through the energy storage pump (35), the water inlet of the ground water source well is also connected with the sun side embedded pipe (22), the sun side embedded pipe (23), the upper embedded pipe (25) and the water outlet of the wet curtain (8), the water outlet of the solar heat collector (32) is also connected with the water inlet of the energy storage tank (34), the water outlet of the energy storage tank (34) is connected with the high-temperature side water outlet of the heat pump unit (33) through the energy storage pump (35) through the heat pump circulating pump (36), and the water inlet of the ground water source well is also connected with the ground heating pipe (6), The solar energy heat pump type solar energy heat collector is characterized in that a water inlet of a middle-layer heating pipe (6 a) and a water inlet of a low-temperature type tail end device (24) are connected, a water outlet of the ground heating pipe (6), the middle-layer heating pipe (6 a) and a water outlet of the low-temperature type tail end device (24) are respectively connected with a water inlet of a solar energy heat collector (32) and a water inlet of a high Wen Cejin water inlet of a heat pump unit (33), the solar energy heat pump type solar energy heat collector type solar energy heat pump type heat pump type heat pump is characterized in that the solar energy heat collector (2) is of a sandwich convector structure, besides an outer transparent layer (2 a), an inner transparent layer (2 c) and a side sunshade curtain (2 b), a side sunshade curtain (21) is arranged on the inner side of the side sunshade curtain (2 b), a solar energy embedded pipe (22) is arranged on the inner side of the side sunshade curtain (21), a convection air inlet window (28 a) is arranged at the bottom of the outer transparent layer (2 a), a convection air outlet window (28) is arranged on the top, and the cathode wall (3) adopts a solid structure, the matched shade surface embedded pipe (23) is embedded in the whole structure of the greenhouse roof, or a sandwich structure is adopted, wherein the shade surface embedded pipe (23) is embedded in the inner solid layer (3 a), an upper sunshade curtain (26) matched with the greenhouse roof (5) is arranged at the lower side of the greenhouse roof (5), the upper embedded pipe (25) is arranged at the lower side of the upper sunshade curtain (26), the outer transparent layer (2 a), the inner transparent layer (2 c) and the greenhouse roof (5) are made of high-transmittance glass or high-transmittance plastic films, the heat insulation curtain (4), the middle heat insulation layer Wen Mubu (4 a), the side sunshade curtains (21) and the upper sunshade curtain (26) are made of high-reflectivity surfaces at two sides, the thickness of the outer heat insulation curtain (27) is 1-10 mm, the low-temperature end device (24) is arranged in the lower space of a plant seedling bed (7) of a production area, and the heat exchange element (24 a) is a plastic pipe, The steel fin structure is high or copper pipe aluminum fin tube structure, the bottom is provided with a condensate water receiving disc (24 b) which falls to the ground, or the steel fin structure is buried under the ground, at the moment, a heat exchange element (24 a) is a plastic tube, or the steel fin structure is vertically arranged at the upper part of a plant seedbed (7) in a production area and positioned in the middle of plant stems and leaves and used as a fence for supporting plant growth, at the moment, the heat exchange element (24 a) is a plastic tube, the water passing temperature in the tube is not more than the allowable temperature range of plant growth, or the steel fin structure is arranged along the inner wall of an outer wall, at the moment, the heat exchange element (24 a) is a plastic tube, a steel fin tube or a copper pipe aluminum fin tube structure.
2. The active solar glass greenhouse based on intelligent natural energy temperature control as claimed in claim 1, wherein the ground water source well (31) adopts a shallow or deep underground water well structure, at least one recharging well is matched with each pumping well, or a buried pipe well structure is adopted, at the moment, a single U pipe or double U pipe structure is adopted in the well, and the pipe is a PE pipe.
3. The active solar glass greenhouse based on intelligent natural energy temperature control as claimed in claim 1, wherein the heat pump unit (33) is a water-water heat pump structure, and the heat supply and cold supply mode conversion adopts a four-way reversing valve inside the heat pump unit or a water valve switching structure outside the unit.
4. The working mode of the active solar glass greenhouse based on the intelligent natural energy temperature control, which is disclosed in claim 1, is used for intelligent heat supply and cold supply load adjustment, natural energy operation control, heat source equipment selection and transportation and distribution management according to the following time and technical conditions:
firstly, when heating and running at night in winter, the heat insulation curtain (4), the middle heat insulation Wen Mubu (4 a), the upper sunshade curtain (4 b), the outer heat insulation curtain (27), the side sunshade curtain (21), the upper sunshade curtain (26), the convection air inlet window (28 a) and the convection air outlet window (28) are all closed and enter a passive heat insulation state, water outlet of the ground water source well (31) is sent into the sunny side embedded pipe (22), the cloudy side embedded pipe (23) and the upper embedded pipe (25) by the ground water pump (37) and enters a movable heat insulation state, water outlet of the energy storage tank (34) is sent into the ground heating pipe (6), the middle heating pipe (6 a), the low-temperature tail end device (24) and supplies heat, and returns to the energy storage tank (34), when the room temperature is lower than a low-limit set value, water outlet of the ground water source well (31) is simultaneously sent into the heat pump unit (33) by the ground water pump (37), the heat pump unit (33) is started and combined with the energy storage tank (34) by the heat pump circulating pump (36), heat is supplied to the heat supply, and the heat pump unit (33) is stopped when the heat pump unit (33) is stopped at the room temperature is higher than the high-limit set temperature or the high-limit set point (33) and the heat pump unit (33) is stopped when the high-limit operation is kept, the heat pump unit (33) is stopped at the high-limit set temperature and the high-temperature limit set temperature is still, when the high-temperature limit set temperature is lower temperature is kept, the energy storage tank (34) is preferentially started until the room temperature is lower than the low limit set value;
Secondly, when the solar heat-preserving curtain (4), the middle heat-preserving Wen Mubu (4 a), the upper sunshade curtain (4 b) and the outer heat-preserving curtain (27) are rolled up in daytime operation in winter, the side sunshade curtains (21) and the upper sunshade curtain (26) are opened and are in a maximum sunlight transmission state, the convection air inlet window (28 a) and the convection air outlet window (28) are closed and enter a passive heat-preserving state, if the room temperature is lower than a low limit set value, the water outlet of the ground water source well (31) is sent into the sunny side embedded pipe (22), the cloudy side embedded pipe (23) and the upper embedded pipe (25) and enter a movable heat-preserving state by the ground water pump (37), the water outlet of the energy-storing tank (34) is sent into the ground heating pipe (6), the middle heating pipe (6 a) and the low-temperature end device (24) and supplies heat, the water outlet of the heat-storing tank (34) is returned to the energy-storing tank (34), when the room temperature is lower than the low limit set value, the ground water source well (31) is simultaneously sent into the heat pump unit (33) when the room temperature is lower than the low limit set value, the heat pump unit (33) is started, and the heat pump unit (33) is stopped when the heat pump unit (33) is stopped at the high-limit set temperature or the high-limit heat pump unit (34) is stopped when the heat pump unit (33) is stopped at the high-limit set temperature, the high-limit unit (33) is stopped when the heat pump unit (33) is stopped at the high-temperature and the high-limit operation, and the heat pump unit (33) is stopped, if the room temperature is still higher than the high limit set value after the heat supply of the energy storage tank (34) is stopped, the operation of the male surface embedded pipe (22) and the ground water source heat source water of the upper embedded pipe (25) is stopped, and the active heat preservation state is stopped, if the room temperature is still higher than the high limit set value, the male surface embedded pipe (22) and the upper embedded pipe (25) are converted into active heat storage operation, at the moment, the energy storage pump (35) pumps energy storage circulating water into the male surface embedded pipe (22) and the upper embedded pipe (25), backwater enters the energy storage tank (34) and enters the energy storage state until the room temperature is lower than the low limit set value, and then enters the gradual heating process according to the reverse order of the cooling process until the room temperature is higher than the low limit set value;
Thirdly, when the room temperature is higher than the high limit set value in the daytime in the non-heating period, the heat preservation curtain (4), the middle heat preservation Wen Mubu (4 a) and the outer heat preservation curtain (27) are rolled up, the side sunshade curtains (21), the upper sunshade curtain (26) and the upper sunshade curtain (4 b) are all opened and are in an illumination state required by plant growth, the convection air inlet window (28 a) and the convection air outlet window (28) are all opened and enter into an active cooling state, if the room temperature is higher than the high limit set value, the water outlet of the ground water source well (31) is sent into the sun surface embedded pipe (22), the cathode embedded pipe (23) and the upper embedded pipe (25) by the ground water pump (37) and enters into the active cooling state, when the room temperature is still higher than the high limit set value, the water outlet of the ground water source well (31) is simultaneously sent into the energy storage tank (34) by the ground water pump (37) and is sent into the low temperature end device (24) or the ground air heating pipe (6 a) by the energy storage pump (35) at the same time, when the room temperature is still higher than the high limit set value, the ground water source well (31) is directly sent into the high limit water pump (31) by the ground water pump set (31) and is sent into the high limit set water pump (37) when the high limit set value (31) is simultaneously, the heat pump unit (33) is started and is sent into the low-temperature end device (24) or the ground heating pipe (6) or the middle-layer heating pipe (6 a) through the heat pump circulating pump (36) to be combined for cooling until the room temperature is lower than the low-limit set value, and then the temperature is gradually increased according to the reverse sequence of the temperature reduction process until the room temperature is higher than the low-limit set value;
fourth, when the night room temperature in the non-heating period is higher than the high limit set value, on the basis of the operation mode adopted when the day room temperature in the non-heating period is higher than the high limit set value, the indoor and outdoor ventilation cooling devices are combined and opened simultaneously.
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| CN113475272A (en) * | 2021-06-23 | 2021-10-08 | 恩施不亦乐乎科技农业有限公司 | Novel energy-saving greenhouse production environment control device based on heat storage heat pump |
| CN117280971B (en) * | 2023-09-19 | 2024-04-26 | 上海华维可控农业科技集团股份有限公司 | Controllable agricultural greenhouse of temperature intelligent control based on photovoltaic solar energy |
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